SlideShare ist ein Scribd-Unternehmen logo
1 von 28
By Fahima Shuja
The Origins of
Language
The Origins of Language
The origins of language
*1. Spoken language probably developed
between 100 000 and 50 000 years ago while
writing only dates back to about 5000 years
ago
2. No direct evidence about the development
of speech. A lot of speculation about the origins
of language, but little known about the topic
3. Little physical evidence on language our
ancestors used
The origins of language
1. The divine source
2. The natural sound source
3. The social interaction source
4. The physical adaptation source
5. The tool-making source
6. The genetic source
1.The divine source
1. The Divine Source
•In most religions, a divine source gives
language to the humans.
•Nearly all divine theories believe that
languages originated from a single source and
are thus monogenetic theories of language
origin.
•Over the ages, people carried out
experiments to rediscover this original, God
given language.
The divine source: the first language
•Experiments: If human infants grow up in isolation, they
will automatically begin to use the original God-given
language!??!
•Psammetichus (Egyptian pharaoh) let two newborn
babies grow up in the company of only goats and a mute
shepherd 2500 years ago.
–they are reported to have started saying the Phrygian
(Turkey) word ‘bekos’ (bread) = original language?
–however, it is more likely that the children imitated
the sounds they heard the goats make
•King James of Scotland carried out similar experiment
around 1 500 years ago.
–the children are reported to have started speaking
Hebrew = original language?
The divine source: The first language
• BUT: Children discovered living in
isolation do not confirm these findings
but grow up with no language at all.
• Criticism: Divine source is impossible
to prove/disprove and the ‘first
language’ is impossible to reconstruct!!
2. The Natural Sound Source
*Bow- Wow Theory:
• Primitive words started as imitations of the
natural sounds early humans heard around
them (bow-wow theory)
• The imitations of sounds were then used to
refer to the things associated with the
relevant sound (onomatopoeia still exist in
our language today: splash, rattle, boom, ...!)
• For example, when a bird flew by making the
sound ‘coo-coo’, it would be called ‘cuckoo’.
• Criticism: how would
soundless things and abstract
concepts have been referred
to??
• Criticism: Language is more
than only a set of names
2. The Natural Sound Source
• Original sounds may have
started as natural cries of
emotion such as pain, anger and
joy;ah, ouch, hey, yay, wow!
(pooh-pooh theory)
• Criticism: The natural cries are produced
with sudden intakes of breath, which is
not the case for ordinary speech!! =>
emotional reactions contain sounds not
otherwise used in speech production.
3. The Social Interaction Source
• Language arose out of the rhythmical grunts of
people working together, involved in physical
effort that has to be coordinated (yo-he-ho
theory)
• Early humans may have developed a set of
grunts, groans and curses used when lifting and
carrying trees/mammoths
• Makes sense as early humans must have lived in
groups, which require some form of organisation
and hence communication to maintain =>
development of language placed in a social
context
• Criticism: Apes and other
primates also live in groups
and use grunts etc without
having developed the capacity
for speech!!
*4. Physical Adaptation Source
• Transition to upright posture & bipedal
locomotion => front limbs free
* Differences between skull of gorilla and
Neanderthal => Neanderthal may have been
able to produce some consonant-like sounds
* Fossilised skeletal structures that begin to resemble
modern humans => partial adaptations that appear
relevant for speech => features are more streamlined
compared to other primates
Features themselves may not have triggered speech
but give good indication that the creatures possessing
them were capable of speech
4. Physical Adaptation Source
• Physical features that distinguish humans
from other creatures may have supported
speech production
• Evolutionary development resulted in partial
adaptations making speech possible for early
humans: _Teeth
– Lips
– Mouth
– Tongue
– Larynx and Pharynx
• TEETH:
• Upright position, not slanting outwards like those of apes
• Roughly even in height
• Good for grinding and chewing
• Very helpful in making sounds such as ‘f’ or ‘v’
• LIPS:
• More intricate muscle interlacing
• More flexible
• Capable of a wider range of shapes
• Suitable for making sounds such as ‘p’ or ‘b’
Physical Adaptation Source
Physical Adaptation Source
• MOUTH and TONGUE:
• Relatively small mouth compared to other
primates: can be opened and closed more
rapidly
• Smaller, thicker and more muscular tongue
that can be used to shape a wide variety of
sounds
• Airway through the nose can be closed off to
create more air pressure in the mouth
Physical Adaptation Source
LARYNX and PHARYNX
• Larynx is “voice box” in your throat containing the vocal
folds or vocal chords
• Due to upright position, head moved directly above the
spinal column and larynx dropped to a lower position
• As a result, the pharynx
(cavity above the vocal folds,
acts as resonator) became
longer => increased range and
clarity of sounds
5. Tool Making Source
• HANDS:
• Humans started making tools and manipulating
objects using both hands
• Manual gestures may have been a precursor of
language: oral gesture theory
• Bringing words together like bringing two rocks
together to make a tool
Tool Making Source
• BRAIN:
• The functions for object manipulation and for
speaking are very close to each other in the left
hemisphere of the brain (lateralisation) =>
there may have been an evolutionary
connection between the use of tools and the use
of language in early humans
• This theory allows for structural organisation
inherent to all language (even sign languages),
not only articulation of sounds to denote
objects
6. The Genetic Source
The Genetic Source
• Young babies go through almost automatic
developments: from small brain, higher larynx to
lowering of larynx, standing upright, walking
and talking.
• Even children who are born deaf become fluent
speakers of a sign language??!!! HOW??
claims that human offspring are born with a
special capacity for language (innateness
theory)
• Capacity for language genetically hard-wired
into newborn humans?
• This applies to all language in general, not one specific
language
• Crucial mutation in human genetics, special “language
gene” that only humans possess
• This would mean that language did not result from a
gradual change but happened rather quickly as a crucial
genetic mutation (unlike physical adaptation, for example)
• No certainty when this genetic change
might have taken place and how it may
relate to physical adaptation
• If we have a special gene for language, can other creatures
also learn language?
*The Origin of Language
Theories Arguments for Arguments against Development
The divine source
(monogenetic)
Suddenly
The natural sound
source (bow-
wow/pooh-pooh)
Existence of
onomatopoeia
Soundless things and
abstract concepts
Produced with
intake of breath
Gradually
The social
interaction source
(yo-he-ho)
Early humans lived
in groups
Other primates also
live in groups and
use grunts
Gradually
The physical
adaptation source
(teeth, lips, mouth,
larynx & pharynx)
There’s evidence for
the evolutionary
changes
These changes
would not
themselves lead to
speech production
Gradually
The tool-making
source (brain)
Accounts for
structural
organisation of
language
Gradually
The genetic source
(innateness theory)
Automatic set of
developments in
young children
Suddenly
Thanks;) Any Questions???

Weitere ähnliche Inhalte

Was ist angesagt?

Animal communication and human language
Animal communication and human languageAnimal communication and human language
Animal communication and human language
Jasmine Wong
 
Origins of language
Origins of languageOrigins of language
Origins of language
Jasmine Wong
 
The origins of language
The origins of languageThe origins of language
The origins of language
07437666
 

Was ist angesagt? (20)

Animal communication and human language
Animal communication and human languageAnimal communication and human language
Animal communication and human language
 
Historical linguistics introduction
Historical linguistics introductionHistorical linguistics introduction
Historical linguistics introduction
 
Origin of Language
 Origin of Language Origin of Language
Origin of Language
 
Language families
Language familiesLanguage families
Language families
 
Origin of language
Origin of languageOrigin of language
Origin of language
 
A presentation on human language vs animal communication
A presentation on human language vs animal communicationA presentation on human language vs animal communication
A presentation on human language vs animal communication
 
Linguistic Universal
Linguistic UniversalLinguistic Universal
Linguistic Universal
 
NAPS 2016 Simon Ager - Origins of Language
NAPS 2016 Simon Ager - Origins of LanguageNAPS 2016 Simon Ager - Origins of Language
NAPS 2016 Simon Ager - Origins of Language
 
Origins of language
Origins of languageOrigins of language
Origins of language
 
Properties of Human language
Properties of Human languageProperties of Human language
Properties of Human language
 
Language change
Language changeLanguage change
Language change
 
The difference between human and animal language
The difference between human and animal languageThe difference between human and animal language
The difference between human and animal language
 
Changing of meaning
Changing of meaningChanging of meaning
Changing of meaning
 
Language and origin of langauge
Language and origin of langaugeLanguage and origin of langauge
Language and origin of langauge
 
Universal grammar
Universal grammarUniversal grammar
Universal grammar
 
The origins of language
The origins of languageThe origins of language
The origins of language
 
Language and Linguistics
Language and LinguisticsLanguage and Linguistics
Language and Linguistics
 
What is linguistics
What is linguisticsWhat is linguistics
What is linguistics
 
Syntax
SyntaxSyntax
Syntax
 
Pidgin & creoles
Pidgin & creolesPidgin & creoles
Pidgin & creoles
 

Ähnlich wie The origin of language

Introduction to linguistic (1)
Introduction to linguistic (1)Introduction to linguistic (1)
Introduction to linguistic (1)
Florizqul Shodiq
 
Origins of language
Origins of languageOrigins of language
Origins of language
Jasmine Wong
 
originoflanguage-141112084018-conversion-gate01 (1) 3.pdf
originoflanguage-141112084018-conversion-gate01 (1) 3.pdforiginoflanguage-141112084018-conversion-gate01 (1) 3.pdf
originoflanguage-141112084018-conversion-gate01 (1) 3.pdf
NadirahHamdan1
 
Language and communication
Language and communicationLanguage and communication
Language and communication
Yota Bhikkhu
 
Introduction of linguistic
Introduction of linguisticIntroduction of linguistic
Introduction of linguistic
Florizqul Shodiq
 

Ähnlich wie The origin of language (20)

1- The origins of Language.pptx
1- The origins of Language.pptx1- The origins of Language.pptx
1- The origins of Language.pptx
 
Origin of Lang.pptx
Origin of Lang.pptxOrigin of Lang.pptx
Origin of Lang.pptx
 
Bab1dan2
Bab1dan2Bab1dan2
Bab1dan2
 
language emergence language emergencee.ppt
language emergence language emergencee.pptlanguage emergence language emergencee.ppt
language emergence language emergencee.ppt
 
ELS102_English Language and Laguage Acquisition .pptx
ELS102_English Language and Laguage Acquisition .pptxELS102_English Language and Laguage Acquisition .pptx
ELS102_English Language and Laguage Acquisition .pptx
 
Presentation1
Presentation1Presentation1
Presentation1
 
introduction to linguistics.ppt
introduction to linguistics.pptintroduction to linguistics.ppt
introduction to linguistics.ppt
 
The Origins Of Language.pptx
The Origins Of Language.pptxThe Origins Of Language.pptx
The Origins Of Language.pptx
 
The Origins Of Language.pptx
The Origins Of Language.pptxThe Origins Of Language.pptx
The Origins Of Language.pptx
 
The Origins Of Language (1).pptx
The Origins Of Language (1).pptxThe Origins Of Language (1).pptx
The Origins Of Language (1).pptx
 
Introduction to linguistic (1)
Introduction to linguistic (1)Introduction to linguistic (1)
Introduction to linguistic (1)
 
Chapter 1.pptx
Chapter 1.pptxChapter 1.pptx
Chapter 1.pptx
 
Origins of language
Origins of languageOrigins of language
Origins of language
 
Communication skills about language
Communication skills about languageCommunication skills about language
Communication skills about language
 
Origins of Human Speech
Origins of Human SpeechOrigins of Human Speech
Origins of Human Speech
 
originoflanguage-141112084018-conversion-gate01 (1) 3.pdf
originoflanguage-141112084018-conversion-gate01 (1) 3.pdforiginoflanguage-141112084018-conversion-gate01 (1) 3.pdf
originoflanguage-141112084018-conversion-gate01 (1) 3.pdf
 
Language across the curriculum.pptx
Language across the curriculum.pptxLanguage across the curriculum.pptx
Language across the curriculum.pptx
 
Language
LanguageLanguage
Language
 
Language and communication
Language and communicationLanguage and communication
Language and communication
 
Introduction of linguistic
Introduction of linguisticIntroduction of linguistic
Introduction of linguistic
 

Kürzlich hochgeladen

Making and Justifying Mathematical Decisions.pdf
Making and Justifying Mathematical Decisions.pdfMaking and Justifying Mathematical Decisions.pdf
Making and Justifying Mathematical Decisions.pdf
Chris Hunter
 
Gardella_Mateo_IntellectualProperty.pdf.
Gardella_Mateo_IntellectualProperty.pdf.Gardella_Mateo_IntellectualProperty.pdf.
Gardella_Mateo_IntellectualProperty.pdf.
MateoGardella
 
1029 - Danh muc Sach Giao Khoa 10 . pdf
1029 -  Danh muc Sach Giao Khoa 10 . pdf1029 -  Danh muc Sach Giao Khoa 10 . pdf
1029 - Danh muc Sach Giao Khoa 10 . pdf
QucHHunhnh
 
Gardella_PRCampaignConclusion Pitch Letter
Gardella_PRCampaignConclusion Pitch LetterGardella_PRCampaignConclusion Pitch Letter
Gardella_PRCampaignConclusion Pitch Letter
MateoGardella
 
Beyond the EU: DORA and NIS 2 Directive's Global Impact
Beyond the EU: DORA and NIS 2 Directive's Global ImpactBeyond the EU: DORA and NIS 2 Directive's Global Impact
Beyond the EU: DORA and NIS 2 Directive's Global Impact
PECB
 
Russian Escort Service in Delhi 11k Hotel Foreigner Russian Call Girls in Delhi
Russian Escort Service in Delhi 11k Hotel Foreigner Russian Call Girls in DelhiRussian Escort Service in Delhi 11k Hotel Foreigner Russian Call Girls in Delhi
Russian Escort Service in Delhi 11k Hotel Foreigner Russian Call Girls in Delhi
kauryashika82
 

Kürzlich hochgeladen (20)

How to Give a Domain for a Field in Odoo 17
How to Give a Domain for a Field in Odoo 17How to Give a Domain for a Field in Odoo 17
How to Give a Domain for a Field in Odoo 17
 
ICT Role in 21st Century Education & its Challenges.pptx
ICT Role in 21st Century Education & its Challenges.pptxICT Role in 21st Century Education & its Challenges.pptx
ICT Role in 21st Century Education & its Challenges.pptx
 
Making and Justifying Mathematical Decisions.pdf
Making and Justifying Mathematical Decisions.pdfMaking and Justifying Mathematical Decisions.pdf
Making and Justifying Mathematical Decisions.pdf
 
Gardella_Mateo_IntellectualProperty.pdf.
Gardella_Mateo_IntellectualProperty.pdf.Gardella_Mateo_IntellectualProperty.pdf.
Gardella_Mateo_IntellectualProperty.pdf.
 
Unit-IV; Professional Sales Representative (PSR).pptx
Unit-IV; Professional Sales Representative (PSR).pptxUnit-IV; Professional Sales Representative (PSR).pptx
Unit-IV; Professional Sales Representative (PSR).pptx
 
Measures of Dispersion and Variability: Range, QD, AD and SD
Measures of Dispersion and Variability: Range, QD, AD and SDMeasures of Dispersion and Variability: Range, QD, AD and SD
Measures of Dispersion and Variability: Range, QD, AD and SD
 
Presentation by Andreas Schleicher Tackling the School Absenteeism Crisis 30 ...
Presentation by Andreas Schleicher Tackling the School Absenteeism Crisis 30 ...Presentation by Andreas Schleicher Tackling the School Absenteeism Crisis 30 ...
Presentation by Andreas Schleicher Tackling the School Absenteeism Crisis 30 ...
 
Holdier Curriculum Vitae (April 2024).pdf
Holdier Curriculum Vitae (April 2024).pdfHoldier Curriculum Vitae (April 2024).pdf
Holdier Curriculum Vitae (April 2024).pdf
 
Mehran University Newsletter Vol-X, Issue-I, 2024
Mehran University Newsletter Vol-X, Issue-I, 2024Mehran University Newsletter Vol-X, Issue-I, 2024
Mehran University Newsletter Vol-X, Issue-I, 2024
 
1029 - Danh muc Sach Giao Khoa 10 . pdf
1029 -  Danh muc Sach Giao Khoa 10 . pdf1029 -  Danh muc Sach Giao Khoa 10 . pdf
1029 - Danh muc Sach Giao Khoa 10 . pdf
 
Gardella_PRCampaignConclusion Pitch Letter
Gardella_PRCampaignConclusion Pitch LetterGardella_PRCampaignConclusion Pitch Letter
Gardella_PRCampaignConclusion Pitch Letter
 
Beyond the EU: DORA and NIS 2 Directive's Global Impact
Beyond the EU: DORA and NIS 2 Directive's Global ImpactBeyond the EU: DORA and NIS 2 Directive's Global Impact
Beyond the EU: DORA and NIS 2 Directive's Global Impact
 
microwave assisted reaction. General introduction
microwave assisted reaction. General introductionmicrowave assisted reaction. General introduction
microwave assisted reaction. General introduction
 
Web & Social Media Analytics Previous Year Question Paper.pdf
Web & Social Media Analytics Previous Year Question Paper.pdfWeb & Social Media Analytics Previous Year Question Paper.pdf
Web & Social Media Analytics Previous Year Question Paper.pdf
 
Class 11th Physics NEET formula sheet pdf
Class 11th Physics NEET formula sheet pdfClass 11th Physics NEET formula sheet pdf
Class 11th Physics NEET formula sheet pdf
 
psychiatric nursing HISTORY COLLECTION .docx
psychiatric  nursing HISTORY  COLLECTION  .docxpsychiatric  nursing HISTORY  COLLECTION  .docx
psychiatric nursing HISTORY COLLECTION .docx
 
Russian Escort Service in Delhi 11k Hotel Foreigner Russian Call Girls in Delhi
Russian Escort Service in Delhi 11k Hotel Foreigner Russian Call Girls in DelhiRussian Escort Service in Delhi 11k Hotel Foreigner Russian Call Girls in Delhi
Russian Escort Service in Delhi 11k Hotel Foreigner Russian Call Girls in Delhi
 
APM Welcome, APM North West Network Conference, Synergies Across Sectors
APM Welcome, APM North West Network Conference, Synergies Across SectorsAPM Welcome, APM North West Network Conference, Synergies Across Sectors
APM Welcome, APM North West Network Conference, Synergies Across Sectors
 
INDIA QUIZ 2024 RLAC DELHI UNIVERSITY.pptx
INDIA QUIZ 2024 RLAC DELHI UNIVERSITY.pptxINDIA QUIZ 2024 RLAC DELHI UNIVERSITY.pptx
INDIA QUIZ 2024 RLAC DELHI UNIVERSITY.pptx
 
Introduction to Nonprofit Accounting: The Basics
Introduction to Nonprofit Accounting: The BasicsIntroduction to Nonprofit Accounting: The Basics
Introduction to Nonprofit Accounting: The Basics
 

The origin of language

  • 1. By Fahima Shuja The Origins of Language
  • 2. The Origins of Language
  • 3. The origins of language *1. Spoken language probably developed between 100 000 and 50 000 years ago while writing only dates back to about 5000 years ago 2. No direct evidence about the development of speech. A lot of speculation about the origins of language, but little known about the topic 3. Little physical evidence on language our ancestors used
  • 4. The origins of language 1. The divine source 2. The natural sound source 3. The social interaction source 4. The physical adaptation source 5. The tool-making source 6. The genetic source
  • 6. 1. The Divine Source •In most religions, a divine source gives language to the humans. •Nearly all divine theories believe that languages originated from a single source and are thus monogenetic theories of language origin. •Over the ages, people carried out experiments to rediscover this original, God given language.
  • 7. The divine source: the first language •Experiments: If human infants grow up in isolation, they will automatically begin to use the original God-given language!??! •Psammetichus (Egyptian pharaoh) let two newborn babies grow up in the company of only goats and a mute shepherd 2500 years ago. –they are reported to have started saying the Phrygian (Turkey) word ‘bekos’ (bread) = original language? –however, it is more likely that the children imitated the sounds they heard the goats make •King James of Scotland carried out similar experiment around 1 500 years ago. –the children are reported to have started speaking Hebrew = original language?
  • 8. The divine source: The first language • BUT: Children discovered living in isolation do not confirm these findings but grow up with no language at all. • Criticism: Divine source is impossible to prove/disprove and the ‘first language’ is impossible to reconstruct!!
  • 9. 2. The Natural Sound Source *Bow- Wow Theory: • Primitive words started as imitations of the natural sounds early humans heard around them (bow-wow theory) • The imitations of sounds were then used to refer to the things associated with the relevant sound (onomatopoeia still exist in our language today: splash, rattle, boom, ...!) • For example, when a bird flew by making the sound ‘coo-coo’, it would be called ‘cuckoo’.
  • 10. • Criticism: how would soundless things and abstract concepts have been referred to?? • Criticism: Language is more than only a set of names
  • 11. 2. The Natural Sound Source • Original sounds may have started as natural cries of emotion such as pain, anger and joy;ah, ouch, hey, yay, wow! (pooh-pooh theory) • Criticism: The natural cries are produced with sudden intakes of breath, which is not the case for ordinary speech!! => emotional reactions contain sounds not otherwise used in speech production.
  • 12.
  • 13. 3. The Social Interaction Source • Language arose out of the rhythmical grunts of people working together, involved in physical effort that has to be coordinated (yo-he-ho theory) • Early humans may have developed a set of grunts, groans and curses used when lifting and carrying trees/mammoths • Makes sense as early humans must have lived in groups, which require some form of organisation and hence communication to maintain => development of language placed in a social context
  • 14. • Criticism: Apes and other primates also live in groups and use grunts etc without having developed the capacity for speech!!
  • 15. *4. Physical Adaptation Source • Transition to upright posture & bipedal locomotion => front limbs free
  • 16. * Differences between skull of gorilla and Neanderthal => Neanderthal may have been able to produce some consonant-like sounds
  • 17. * Fossilised skeletal structures that begin to resemble modern humans => partial adaptations that appear relevant for speech => features are more streamlined compared to other primates Features themselves may not have triggered speech but give good indication that the creatures possessing them were capable of speech
  • 18. 4. Physical Adaptation Source • Physical features that distinguish humans from other creatures may have supported speech production • Evolutionary development resulted in partial adaptations making speech possible for early humans: _Teeth – Lips – Mouth – Tongue – Larynx and Pharynx
  • 19. • TEETH: • Upright position, not slanting outwards like those of apes • Roughly even in height • Good for grinding and chewing • Very helpful in making sounds such as ‘f’ or ‘v’ • LIPS: • More intricate muscle interlacing • More flexible • Capable of a wider range of shapes • Suitable for making sounds such as ‘p’ or ‘b’ Physical Adaptation Source
  • 20. Physical Adaptation Source • MOUTH and TONGUE: • Relatively small mouth compared to other primates: can be opened and closed more rapidly • Smaller, thicker and more muscular tongue that can be used to shape a wide variety of sounds • Airway through the nose can be closed off to create more air pressure in the mouth
  • 21. Physical Adaptation Source LARYNX and PHARYNX • Larynx is “voice box” in your throat containing the vocal folds or vocal chords • Due to upright position, head moved directly above the spinal column and larynx dropped to a lower position • As a result, the pharynx (cavity above the vocal folds, acts as resonator) became longer => increased range and clarity of sounds
  • 22. 5. Tool Making Source • HANDS: • Humans started making tools and manipulating objects using both hands • Manual gestures may have been a precursor of language: oral gesture theory • Bringing words together like bringing two rocks together to make a tool
  • 23. Tool Making Source • BRAIN: • The functions for object manipulation and for speaking are very close to each other in the left hemisphere of the brain (lateralisation) => there may have been an evolutionary connection between the use of tools and the use of language in early humans • This theory allows for structural organisation inherent to all language (even sign languages), not only articulation of sounds to denote objects
  • 24. 6. The Genetic Source
  • 25. The Genetic Source • Young babies go through almost automatic developments: from small brain, higher larynx to lowering of larynx, standing upright, walking and talking. • Even children who are born deaf become fluent speakers of a sign language??!!! HOW?? claims that human offspring are born with a special capacity for language (innateness theory) • Capacity for language genetically hard-wired into newborn humans?
  • 26. • This applies to all language in general, not one specific language • Crucial mutation in human genetics, special “language gene” that only humans possess • This would mean that language did not result from a gradual change but happened rather quickly as a crucial genetic mutation (unlike physical adaptation, for example) • No certainty when this genetic change might have taken place and how it may relate to physical adaptation • If we have a special gene for language, can other creatures also learn language?
  • 27. *The Origin of Language Theories Arguments for Arguments against Development The divine source (monogenetic) Suddenly The natural sound source (bow- wow/pooh-pooh) Existence of onomatopoeia Soundless things and abstract concepts Produced with intake of breath Gradually The social interaction source (yo-he-ho) Early humans lived in groups Other primates also live in groups and use grunts Gradually The physical adaptation source (teeth, lips, mouth, larynx & pharynx) There’s evidence for the evolutionary changes These changes would not themselves lead to speech production Gradually The tool-making source (brain) Accounts for structural organisation of language Gradually The genetic source (innateness theory) Automatic set of developments in young children Suddenly